Could be leukoplakia. Just get the biopsy and wait for the results. If it's leukoplakia, it could convert to cancer at some point, but supposedly it's rare.

40 y.o., undiagnosed, spitting up blood past 4-5 months at random intervals, several enlarged lymph nodes under chin and neck, biopsy of one showed benign viral lymphadenopathy. Still being monitored by ENT.